Preheat oven 375F (190C).Clean the bell peppers. Place them on a oven pan lined with aluminum foil. Place in the oven for about 30 minutes until they start showing dark burn spots and they are softer.Open the bell peppers and remove seed and stem. Pull and remove the skin.Slice the bell peppers longitudinally about one-inch (2 cm).Place the bell peppers in a bowl. Add the garlic, olive oil, vinegar and mix thoroughly. Serve lukewarm.